Got ahold of a Casio fx-991ex and CG-50 to match my Classpad II. I'm really impressed with them but there is something about the fx-991ex... (see comments) : r/calculators
Amazon.com : Casio Graphing Calculator with Large 21-Character x 8-line Display with Dual Screen Capability. 62K RAM with USB - White - New - Retail - FX-9750GIIWE-L-IH : Office Products
Black Graphing Calculator Casio Fx Cg50
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Scientific Calculator Casio Fx-991ex Classwiz With Solar Battery Non-programmable And Allowed For Ege 552 Functions Carbon Body Design - Calculators - AliExpress
fx991EX Functions, Tables, Regressions and Visualization with QR Code Mini-Math Lesson) - YouTube
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Found this incredible function on my Fx991EX if you press shift and Option button on left corner it creates a QR code that can be scanned with a phone to see graphing
Plotting/ Creating Tables from equations using Casio FX 991EX - YouTube
Table function of CASIO fx 991 EX with QR Code - YouTube
fx-991EX Graphing the Absolute Value Function w/A Scientific Calculator - YouTube